By Lisa Richwine and Dawn Chmielewski LOS ANGELES (Reuters) -Walt Disney said on Thursday it would boost its dividend by 50% and double its share buyback plan for fiscal 2026, as the media giant's streaming and parks businesses powered a quarterly earnings beat. Still, shares of the company fell nearly 3% in premarket trading as overall revenue missed market expectations, weighed down by the continued slide in the cable TV business. Disney posted an adjusted earnings per share of $1.11 for its fourth quarter ending in September, a 3% decline from a year earlier but 6 cents above an average LSEG estimate. Profit rose in Disney's theme parks unit, partially from an expansion of the U.S. cruise ship business and growth at Disneyland Paris. Earnings at its streaming business surged 39% to $352

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